# Copyright (C) 2006 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Tests for bzr xml serialization performance."""

from bzrlib import (
    cache_utf8,
    xml5,
    )
from bzrlib.benchmarks import Benchmark


class BenchXMLSerializer(Benchmark):
    """Benchmarks for serializing to/from XML."""

    def test_write_to_string_kernel_like_inventory(self):
        # On jam's machine, ElementTree serializer took: 2161ms/13487ms
        #                      with Robert's serializer:  631ms/10770ms
        #                      with Entity escaper:       487ms/11636ms
        #           caching Entity escaper, empty cache:  448ms/ 9489ms
        #           caching Entity escaper, full cache:   375ms/ 9489ms
        #                      passing around function:   406ms/ 8942ms
        #              cached, passing around function:   328ms/11248ms
        #                      removing extra function:   354ms/ 8942ms
        #              cached, removing extra function:   275ms/11248ms
        #                          no cache, real utf8:   363ms/11697ms
        #                            cached, real utf8:   272ms/12827ms
        # Really all we want is a real inventory
        inv = self.make_kernel_like_inventory()

        xml5._clear_cache()
        # We want a real tree with lots of file ids and sha strings, etc.
        self.time(xml5.serializer_v5.write_inventory_to_string, inv)

    def test_write_kernel_like_inventory(self):
        # Really all we want is a real inventory
        inv = self.make_kernel_like_inventory()

        xml5._clear_cache()
        f = open('kernel-like-inventory', 'wb')
        try:
            # We want a real tree with lots of file ids and sha strings, etc.
            self.time(xml5.serializer_v5.write_inventory, inv, f)
        finally:
            f.close()

    def test_write_to_string_cached_kernel_like_inventory(self):
        inv = self.make_kernel_like_inventory()

        xml5._clear_cache()
        # We want a real tree with lots of file ids and sha strings, etc.
        xml5.serializer_v5.write_inventory_to_string(inv)

        self.time(xml5.serializer_v5.write_inventory_to_string, inv)

    def test_read_from_string_kernel_like_inventory(self):
        inv = self.make_kernel_like_inventory()
        as_str = xml5.serializer_v5.write_inventory_to_string(inv)

        cache_utf8.clear_encoding_cache()
        read_inv = self.time(xml5.serializer_v5.read_inventory_from_string,
                             as_str)
        # TODO: make sure the final inventory is equal as a sanity check

    def test_read_from_string_cached_kernel_like_inventory(self):
        cache_utf8.clear_encoding_cache()
        inv = self.make_kernel_like_inventory()
        as_str = xml5.serializer_v5.write_inventory_to_string(inv)

        xml5.serializer_v5.read_inventory_from_string(as_str)

        read_inv = self.time(xml5.serializer_v5.read_inventory_from_string,
                             as_str)
        # TODO: make sure the final inventory is equal as a sanity check
